undefined | Better HN

0 pointsTylerE1y ago0 comments

The concern isn’t the sign of the db on disc but doubling the size of all the indexes in memory

0 comments

3 comments · 1 top-level

sgarland1y ago· 2 in thread

Or if it’s MySQL, the PK is implicitly copied into every secondary index. Adds up quickly.

Wow did not know that. MySQL has tons of hidden behavior.

So does Postgres to an extent, but in general, MySQL has more hidden edge cases, and Postgres has more hidden maintenance requirements.

j / k navigate · click thread line to collapse